Drilling apparatus.



.(5. H. GILMAN.

DRlLLNG APPARATUS.

Patented Jan. 1,1918.

G. H. GILMAN. DBILLlNG APPARATUS.

APPLICATION FILED )ULY 5,1912.

' Patented Jam-1, 1918.'4

2 SHEETS-SHEET 2.

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GEORGE H. GILMAN, F CLAREMONT, NEW HAMPSHIRE, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO SULLIVAN MACHINERY COMPANY, OF BOSTON, MASSACHUSETTS, A

CORPORATION' OF MASSACHUSETTS.

DRILLING APPARATUS.

specification of Leiters Patnt.

Patented Jan. 1. 1913.

Application iled July 5, 1912. Serial No. 707,715.

the drill tool with its drill-bit is sunk bodily into the hole as it isbeing drilled.

My invention will be best understood by reference to the following specification, when taken in connection with the accompanying illustration of one specific embodi ment thereof, while its scope will be more particularly pointed out in the appended claims.

Referring to the drawings Figure 1 is a central vertical longitudinal section, partly in elevation, of the specilc drilling tool embodying my invention, with the outer end of the aperture fluid conduit and its swivel joint broken away, showing the drill sunk into a drilling hole in the stone or other material, the latter' being shown in section;

Fig. 2 is a sectional View, partly in elevation, on an enlarged scale on line 24-2 of Fig. 1, illustrating the. rotating and guiding mechanism and its driving motor;

Fig. 3- is a sectional view on an enlarged scale on` line 3 3 of Fig. 1;

Figi 4 is a sectional view on an enlarged scale *on line 4 4 of Fig. 1;

Fig. 5 isa, sectional view on an enlarged scale on line 5-5 of Fig. l. Fig. 6 is a detail sectional view on line 6-6 of Fig. 5;

Fig. 7 is a detail sectional view on line 7-7 of Fig. 5;

Fig. 8 is a detail sectional view on line 8-8 of Fig. 5;

Fig.` 9 'is an enlarged detailvelevation, partly in vertical longitudinal section of the outer end of the pressurefluid conduit, illustrating the swivel joints; and Y l Fig. 10 is a central vertical longitudinal section of a modication of the feeding cyll inder and piston.

Referring to the drawings, and to the embodiment of my invention which I have there shown for illustrative purposes, 1

`have there disclosed a drilling apparatus having a suitabl .rill tool 11, which may be' of the impact hammer type, provided with a drill-bit 12, which may be non-rotatably held in any suitable manner in arcasing 13 of the drill tool. The drill tool'may be electrically or mechanically driven, but herein is of the pressure-iiuid type, and'y is provided with 'a piston hammer 14 adapted to strike one end of the drill-bit 12 in a usual and well-lrnown manner, the piston being reciprocated under the influence of a suitable pressure-Huid, as for example, comA pressed air, admitted to the tool through a suitable pressure-fluid conduit 15, the latter preferably having an axial or central attachment to ythe upper or outer end of the tool. The detailed construction of the tool is of no consequence as bearing upon the broad principles of my invention, the construction of the tool shown, however, being similar in its general character to that shown in my prior U. S. Patent No. 853,921, dated May 4, 1907.

The pressure-fluid conduit 15 may be secured to the drill tool in any suitable man ner, but l have herein shown for this purpose connecting devices which afford a means ior quickly'and conveniently, yet securely, attaching the conduit t0 the tool in such a manner that they do not become disconnected by reason of the vibration to which the parts are subjected, while at the same time permitting the apparatus to be readily dismounted at will. To this end, I have provided a tubular plug 16, constituting a conduit threaded into -the outer 'or upper end of the drill casing 13, and, held against rotation with respect to the drill tool by suitable means preventing the parts from unscrewing, herein a collar 17 suitably inter-engaging with the plug 16 and the tool casing 13. In the present instance, this collar is provided with one or more teeth 18, normally'engaging suitable recesses 1-9 provided in the tool casing 13, and is mounted to slide on the plug 16 into and out of interengagement with the tool casing, but is held against rotation on said plug by one or more of the plug with a series of teeth 26, herein /keys or feathers20, 8) freely movable in key-ways 21 provided in the plug. Suitvsimply raising the collar 17 against the ten- .sion of the spring 22 tov withdraw the teeth 18 out of engagement with the recesses 19.

The plug 16 may be secured to the conduit 15 in any suitable manner, but l have herein shown these parts threaded together, the plug being provided with a reduced exter nally-threaded portion 24, threaded into the interior of the conduit 15. As 'a means for locking the conduit and'plug against accidental unscrewing, l may provide the lower terminal portion of the conduit with a series of teeth 25, and the upper terminal portion Y inthe form of ratchet teeth, one set inclined inthe opposite direction from the other, ano'.

having' suitable engaging means to lock them against relative rotation. rfliis locking means may consist of a collar or'sleeve 27, .embracing the terminal portions of the conduit and plug, and provided with suitable means engaging-the two sets of teeth, herein oppositely acting .yielding spring parvis, or the like, 2.8 and 29, herein formed integral with the sleeve 27. These may be conveniently formed `by slotting the sleeve or collar 27, as shown in Fig. l, thus foriningtongues, which may be bent inwardly. as 'shown in Figs. 6 andV 7, suitably to engage the two sets of teeth 25 and 26. Preferably the sleeve is vslotted as at 30, to enable its application to `and removal from the conduit and plug.

Preferablythe outer terminal portion-of the. conduit l5 is constructed in a manner" similar tothe limer terminal portion )ust' described, am? is similarly secured to a nipple 31. The onduit may receive its supply of pressure-f1 id from a suitable supply conduit 32, herein. a usual form of flexible con- .duit or hose, having swiveled connection with the conduit- 15, so as to permit the latter to be rotated during the operation of the tool, while allowing the conduit 32 to remain relatively fixed. This swivel'ed vconnection may be of any suitable construction, but herein there is connected to the flexible conduit 32 a tubular swivel member 33, provided with an outwardly extending lateral annular ange 34, abutting against the end of the nipple 31, and held in engagement therewith y by suitable'means, herein ra collar 35, provided with anl inwardly. extending annular ilange A36 encircling the swivel member-33..

ner, as by providing the collar with an ins vported and rotated, while .at the saineV time lthis saddle may support the conduit liiterposed between the flanges 34 and 36 is a suitable packing 37 toprevent leakage of the pressure-fluid. Thev collar 35 may be secured to the nipple 31 in any suitable manternal screw-thread threaded onto a Corresponding thread formed externally upon the nipple. By this means, the collar may be adjusted to compress the packing 37 and insure a non-leaking though freely swiveling connection between the parts. The collar may be secured in the desired position. of adjustment by suitable means, lherein a clamp-screw 38 passing through .ears 39 pron l vided on the collar.

Y The conduit 15 serves not only as a means for conducting the supply of pressure fluid to the tool,l but also as a shank by means of which the tool may be manipulated and suppermitting the tool and shank. to be fed in any suitable vina-nner toward the work, as for example by feed means which will 'be described hereinafter. As a' means for supporting and guiding the shank or conduit 15, and imparting a rotary movement thereto, I may provide a rotating mechanism and sultable motive-power means for operating the same, -which will presently be described. Herein the rotating mechanism and its moto-r and the tool-,feeding mechanism are mounted upon a column 40, which may beef any usual construction, having at its lower terminal portion a yoke 41, which maybe provided with jackscrews 42-42 resting 3.06 uponhlocks r3 supported. upon theloor of the quarry or mine. The upper portion of the column which is shown brokem away may be suitably. equipped to engage the roof or an -over-haiiging projection ora beam in the mine or quarry in a usual and well' known manner, which it will be unnecessary toI show anddescribe herein since the character of the support per se is not essential to y a proper understanding of my presentl iiivention. The column 40 may be provided with a saddle 44, swiveled at 45 thereomand 15 by suitable means, which will presently be de.- scribed.

Referring now to the means for moving the conduit 15 in opposite directions to advance and retract the drill tool, l provide suitable means, herein a feed cylinder 46 and piston 47, the former being suitably supported upon the saddle44, as for example by a s'wiveled'shell 48, which permits the cylinder together with the "parts carried thereby to be swung laterally. The conduit '15 passes through the cylinder 46 and piston 47, A125 the latter being provided with a tubular extension 49 passingthrough the rear endof the cylinder. The cylinder may b e provided with a suitable packing 50, encircling the piston extension 49 to prevent leakage of the.. 1,30

duit.

' cylinder.

In order that the longitudinal movement of the feed-piston in its cylinder may be utilized to impart a like movement to the shank 15 and the drill tool carried thereby, the piston may be secured to the conduit l5 by means permitting feeding engagement of the piston with the conduit at different points along the latter. I have provided for this purpose frictional clamping means comprising an internally tapered member 53 concentric with and having screw-threaded engagement with the tubular extension 49 of the piston member and one or more frictional engaging devices, herein three segmental members 54 interposed between the internally tapered portion of the member 53 and the periphery of the conduit 15, and preferably having an external taper corresponding to the internal taper in the member 53. l preferably provide suitable yielding means tending to hold the frictional engaging devices 54 out of engagement with the conduit 15, herein a spring 55. rIhe member 53 may be provided with a suitable hand-wheel 56, by means of which the same may be rotated to cause the membe-rs 54 to grip the conduit 15 at any desired point along the latter. It will now be evident that if the gripping devices just described be caused to 'grip the conduit 15 when the piston 47 is at tlife rear or right-hand end of the cylinder (Fig. 1), and pressure-fluid be supplied to the right-hand end of the cylinder, the piston will move forwardly or toward the left, under the influence of the pressure-fluid, and will consequently feed the conduit and the attached drill tool toward the left, and advance the same into the,

work. 'lVhen the feeding movement has continued until the piston has reached the forward end of its cylinder and the feeding movement is thereby arrested, the gripping device may be released from the conduit, and the piston returned to its initial position. The gripping devices may then be utilized to take a fresh hold upon the conduit at another point in its length, and the piston ad-l vanced once more as before, and this method of operation may be continued indefinitely, being limited only by the length of the con- The piston 47 may be controlled by any `suitable means, but I have herein shown for this purpose a plug valve 57, swiveled in the cylinder 4G, the latter having two ports 5S and 59 leading to opposite ends respectively of the cylinder and adapted to be placed, one in connection with the atmosphere and the other with a source ofuid-pressure supfor this purpose being provided with a seg- .plv and vice versa, by said valve, the latter"- mental admission port 60 and an exhaust port 61, the latter communicating with an axial'outlet 62. The outer end of the valve 57 may be providedl with a suitable grasping handle 63, by means of which the valve may be oscillated to at one time establish communication between the port 58 and a port 64 leading to a source of pressure-fluid supply and the port 59 in communication with the atmosphere; and at another time place the port 59 in communication with vthe source of pressure-fluid supply and the port 58 in communication with the atmosphere. Thus it will be'seen that by properly manipulating the valve, the piston 47 may be caused to travel in either direction in its cylinder 46 under the iniiuence of the pressure-iuid.

Referring now to the rotating meclianism and its motor, the rotating mechanism preferably comprises a roller or other similar clutch comprising a series of rollers or balls 65, engaging the periphery of the conduit 15 and mounted in a suitable cage 66, encircling the conduit. The cage 66 receives the intermittent rotary motion from a ring 67 swiveled in a casing 68, herein forming a part of the cylinder casting. 'This ring is provided with suitable inclined depressions 69 to receive the balls or rollers 65, and serving to wedge the latter into driving engage ment with the conduit when the ring is rotated in one direction, while permitting the rollers or balls to be freed from such driving engagement upon a partial rotation of the ring in the opposite direction. Thus if the ring 67 be rotated contra-clockwise, (Fig. 2) the balls or rollers 65 will be crowded into engagement with the conduit 15,-so as to rotate the latter, while upon a return movement of the ring, the cage 66 with its rollers or balls 65 is rotated clockwise by suitable means, herein a Spring 70 bearing at one end against a pin 71 engaging the teeth 72 of the cage. The spring 70 is locked in a recess 73 provided in the ring 67, there being provided a suitable screwthreaded plug'74 to permitthe introduction and adyustment of the spring. This spring serves to urge the balls or rollers 65 con` y fore described. It Will now be seen that When the valve 57 is properly positioned to supply pressure-huid through the port 59 to the rear end of the cylinder 46 to advance the tool into the Work, a part of the pressure-fluid will pass through the passage 79 to the constant pressure space of the motor, so as to drive the latter 'during .the feeding of the tool.. When, hoiveverft'he valve 57 is properly positioned to supply pressure -Huid through the port -58 to the forward end oi1 the cylinder for the purpose of retracting the drill tool', the port 59 and hence the passage 79 and pressure-space 78 ot' the motor, will be placed in ccommunication with the' atmosphere, so that the' motor Will not be driven during the retraction ot the tool.

Thus it Will be seen that the valve exercises a conjoint control. of thetool feeding mechanism and the tool rotating),l mechanism, and is capable of4 admitting pressure fluid to the rotating mechanism and feeding' mechanism to cause the tool to be advanced androtated, or may be operated to withhold pressure- Huid from the rotating mechanism While supplying pressure-fluid to the feeding mechanism. to cause the tool to be retracted.

Referring now more particularly to the operation-ot' the motor itself, the uid pressure in the space 78' acts against a reduced portion 80 on one end of 'the piston 76, and

hence tends to constantly urge the latter to-l ,Ward the left (Fig. 2), While ,pressure exists in the space 78. The opposite end of the cylinder is provided Wit-h one or more ports 8l, directly communicating with theatmosphere.

Hence the piston 76 will he moved toward the left (Fig. 2) under the influence `oi the pressurefuid on a small area of its reduced portion 80, until the latter passes beyond a port 82, whereupon com- -munication is established between said port and the constant pressure-spacev78, and the pressure-fluid is conducted through said portand through a passage 83 and port 84: to the left-,hand end of the cylinder. Now, since the area of the left-hand end of the piston 7 6 is greater than that of the reduced portion 80, the pressure acting against the latter will be over-balanced, and the piston will return to its initial position, whereupon the reduced portion will. cut ed' commuhaust to the atmosphere throughthe ports 81. There may be provided a suitable vent 85 leading from the annular space about the reduced portion 8O to the atmosphere to permit the. free entrance and exit of `atmospheric air at this point, and prevent the formation of a cushion. inder ends may be provided With plugs 86 and 87 having cushioning springs 88 and 89, respectively, operating in a Well-known manner to cushion the piston at each end of its stroke. v

vlt will noiv be evident that if the drill tohl be operated to drill a hole into the side, or bottom, or the roof, .of a mine, quarry, /hr other place, a step-by-step rotative m vement may be imparted to the tool, lso as to present the cutting' edges of the drill-bit at a fresh place With each stroke, and at the' Sametime, the tool is fed bodily bythe eeding mechanism into the drilledhole to .any desired depth Within the range of the conduit l5, and the latter will be properly guided and held against lateral movement It desired, the cylduring its rotation. t will also he'evident that the tool will continue to receive its proper supply of pressure fluid through the use of the swiveled connection, Without interfering in any Way'with its rotation,

Referring now toiig. 10, wherein l have l shown a moditcation of the ,feed cylinder and its piston, 90 is the feedv cylinder and 91 the feed piston, ditering from the feed piston and cylinder hereinbeforedescribed, in that the piston Ql'is provided With a forwardly extending tubular extension 92, passing through the forward end of the cylinder, Y

the latter being provided With a suitable gland 93 having a packing 94., encircling the piston' extension to prevent the leakage ofv pressure-fluid from the cylinder at this this construction is that since the pressurefluid conduit 95 1s inclosed by the piston and point. @ne of the advantagesv resulting from its extensions Where it passes through both ends ot the cylinder 90, the conduit is not required to pass directly through the front cylinder head' and hence is not obliged to have ak good'sliding tit with any gland or packing, and accordingly the conduit need not be .accurately mountechbut may be comparatively rough and uninished. In this form/ot my invention, as in the form first described, the' piston is secured to the conduit by Suitable gripping means, similar to that hereinbefore described, whereby the piston may feed the tool forward into the work, and then be retracted so as to take afresh grip upon the conduit, and again feed the tool forward.

My invention is not limited to the employment of any particular form of motive iis power, nor isthe same limited to the employ.

ment alone of an impact drill member, as distinct from a reciprocatory drill.

While I have herein shown two embodiments of my invention for illustrative purposes, and have disclosed and discussed in detail the construction and arrangement incidental to two specific embodiments thereof,

it is to be understood that the invention isv limited neither to its specific embodiments herein shown, nor to the mere details or relative arrangement of parts, but that extenl'sive deviations from the illustrated forms or kmeans for imparting a longitudinal move.

ment to said shank, and a single manually operable means for conjointly controlling the operation of both of said means.

2. A drilling machine having, in combination, a drilling tool, a shank secured to said drilling tool, means for rotating said shank, feeding means for imparting a longitudinal movement 'to said shank in opposite directions, and means for supplying power to said rotating means and feeding means, including provision for alternatively withholding power from Asaid rotating means while supplying power to said feeding means.

3. A drilling machine having, in combination. a drilling tool, a shank secured to said drilling tool, pressure fluid means for rotating said shank, pressure fluid feeding means for imparting a longitudinal movement to said shank in oppositel directions, and means for admitting pressure fluid to said rotating means and feeding means to cause the tool to be advanced and rotated, including provision alternatively to withhold pressure fluid from said rotating means while supplying pressure fluid t0 said feeding means to cause the tool to be retracted.

4;. A drilling machine having, in combination, a drilling tool, 'a shank secured to said drilling tool, pressure fluid means for rotatingsaid shank, a pressure fluid feed cylinder and piston one of which is connected to said shank, and means including a valve for simultaneously admitting pressure fluid to said rotating means and one end of said cylinder, or withholding pressure fluid from said rotating means While admitting pressure fiuid to the opposite end of said cylinder.

5. drilling machine having, in combination. a drilling tool, a shank secured to said drilling tool, lpressure fluid means for rotating said shank, a pressure fluid feed cylinder and piston one of which is connected to said shank, and means including a valve for simultaneously admitting pressure fluid to said rotating means and to one end of said cylinder and placing the other end in communication with the atmosphere, or withholding pressure iiuid from said rotating means and admitting pressure fluid to said other end and placing the first mentioned end in communication with the atmosphere.

6. In' a. drilling apparatus the combina* tion with a. percussive drilling tool having a drill bit, of motive power means for rotating said drill bit, pressure actuated feeding means including a cylinder member and a pistonv member, and an adjustable connection between one of said members and said tool, whereby a longer feed than the length of the piston members travel can be secured.

7. In a drilling apparatus, the combination with a4 hammer drill, of motive power means for rotating said hammer drill, pressure actuated feeding means including a cylinder member and a piston member, and an adjustable connection between one of said members and said tool, whereby a longer feed than the length of the piston members travel can be secured.

8. A drilling apparatus having, in combination, .a drilling tool having a drill bit, means for bodily rotating said drilling tool and its drill bit, means for imparting a longitudinal motion to said tool and its drill bit, and means for conjointly controlling the operation of both of said means.

9. A drilling apparatus having, in combination. a drilling tool, means for rotating said tool, feeding means for imparting a longitudinal movement to said tool in opposite directions, and means for supplying power to said rotating means and feeding means, or withholding power from said rotating means while supplying power to said feeding means.

10. A drilling apparatus havingin combi- Frnation, a drilling tool, pressure fluid means for rotating said tool, pressure fluid feeding means for imparting a longitudinal movement to said tool in opposite directions, and means for admitting pressure fluid to said rotating means and feeding means. to cause the tool to be advanced and rotated. or withholding pressure fluid from said rotating means while supplying pressure fluid to said feeding means to cause the tool to be retracted. v

1l. A drilling apparatus having, in combination` a drilling tool having a drill-bit` means for hodilyl rotating said drilling tool and its `drill-bit, a pressure fluid feed cylinder and piston, one of which is connected to said tool, and a single valve means for ad'- bination, a drilling tool having d drill-hitfpressure fluid means for bodily rotating said drilling tool and iis drill-bit, a pressure-fluid feed cylinder member and piston.

member, one of which is connected 13o. said tool, andi/*dive ineens for snnuhmieouslyady initting pressui-e fluid to said isotating means and ene end of said cylinder, or Withholding' pressure iuid from said rotating means While admitting pressuie Huid to the oppo site end of said cylinder.

-n/testiinonywhereof, I have signed my naine te this specification, in the presence of GiLMAN.

two subsciiloing Witnesses.

. GEGRGE H. Vitnesses:

d. BOUCHAKD, C. el. Jones., 

